think id choose the fezza TBH its still seriously close to the vette but has lots of quality inside and out and kit, + one really nice F1 style ASR/ESP/TC system and... its a ferrari
next id choose the porsche next for the same reasons as the ferrari
finally it would be down to the choice of the mad and wild vette and the controlled skill of the GTR... my personality dictates id want to choose the vette on looks and noise alone but im too boring and normal to do it so id have a GTR.. in the end its a big engine with two turbos and im sure there are applications to release more power than any of the cars on show by virtue of the turbos and the ability to put this power down all the time in all weather.
IMO